I would def start over again
The whole point of bankroll management is to avoid having to start all over, and avoid losing all of your roll.
If you are simply trying to "hit it big" then you are probably doing too much gambling and not enough poker playing. I guess it just depends on what you are trying to do. Are you trying to have fun and get better at the game, or are you trying to "hit it big"? If you are trying to do the latter without first doing the former, there are good
odds that you will be frequently losing your entire roll and having to start over.
If you practice good bankroll management, you can still lose your entire bankroll. If you started with too small a roll, or you are neglecting to study at all and are not improving much, you may have to start all over with a reload, if you can afford it. But the whole idea of the rules of bankroll management is to keep the risk low and the potential for bankruptcy to a minimum. That is why you should start with an adequate bankroll and keep your wagers/buy ins to a very small percentage of the total bankroll.
Everyone is different; some want to hit it big and some want to play and have fun at low stakes before trying to move up to the bigger games and bigger potential prizes. The main thing should be only playing with money that you can afford to lose. Some can afford to lose more than others, and that's fine. Don't go by what other people are doing, go by what you want from the game and how much you can afford to play with/lose.